WO2020143092A1

WO2020143092A1 - Bistable electromagnet

Info

Publication number: WO2020143092A1
Application number: PCT/CN2019/073993
Authority: WO
Inventors: 朱家义
Original assignee: 朱家义
Priority date: 2019-01-10
Filing date: 2019-01-30
Publication date: 2020-07-16
Also published as: CN109545499A

Abstract

A bistable electromagnet, comprising block-shaped permanent magnets (1), a coil package (2), a reversible magnet (3), a magnetizer (4), and a housing (5). The reversible magnet (3) is disposed in the upper half of an inner cavity of the housing (5); the circumferential side of the reversible magnet (3) is covered by the coil package (2); upper and lower surfaces of the reversible magnet (3) are different magnetic poles; the magnetic axis of the reversible magnet (3) coincides with the geometric central axis of the reversible magnet (3); the upper surface of the reversible magnet (3) is attached to the housing (5); the magnetizer (4) is disposed in the lower half of the inner cavity of the housing (5); the lower surface of the reversible magnet (3) is attached to the magnetizer (4); the multiple independent block-shaped permanent magnets (1) are disposed between the magnetizer (4) and the inner wall of the lower half of the inner cavity of the housing (5); the multiple independent block-shaped permanent magnets (1) are uniformly disposed along the circumference of the magnetizer (4); polarity arrangement of the adjacent block-shaped permanent magnets (1) keeps consistent; the magnetic axis points to the center of the circumference of the magnetizer (4). The bistable electromagnet is provided with two kinds of stable states, flexible and controllable instant completion does not require continuous power supply, and therefore, the bistable electromagnet is not caused to continue to generate heat; hence the bistable electromagnet is an energy-saving and reliable electro-magnetic conversion device.

Description

Bistable electromagnet

[Technical Field]

The invention relates to the technical field of electromagnets, specifically a bistable electromagnet.

[Background technique]

The electromagnet is an important executive device in industrial control. The electromagnet is an electromagnetic conversion device. A conductive winding matching its power is wound on the outside of the iron core. This coil with current is magnetic like a magnet. In order to make the iron core easier to magnetize, the electromagnet is often made of soft iron or silicon steel material that demagnetizes faster. Such an electromagnet has magnetism when it is energized, and the magnetism disappears after the power is turned off, that is, electricity is generated, There is no magnetism when power off; there is also a type of electromagnet that loses electricity, no magnetism when power is turned on, and magnetism when power is turned off; these two kinds of electromagnets have a common feature, that is, there is only one stable state, that is, monostable state, performance when powered on The state that comes out is an unstable state.

[Summary]

The purpose of the present invention is to improve on the basis of the existing technology and provide a bistable electromagnet with a new structure, which can be achieved: once the power-on trigger is completed instantaneously and the state of the selected electromagnet (magnetic or non-magnetic) is established and then does not need to continue Power supply, that is to say, once the state of the electromagnet is established (magnetic or non-magnetic), no external energy is required to maintain this state, and this state will not be easily broken, and it can be maintained indefinitely unless you choose another option. A state operation is established.

In order to achieve the above purpose, a bistable electromagnet is designed, which is characterized by comprising: a block-shaped permanent magnet, a coil package, a reversible magnet, a magnetizer, and a casing, and the inner cavity of the upper half of the casing is provided with a reversible Magnets, the circumference of the reversible magnet is covered with a coil package, the magnetic axis of the reversible magnet coincides with the geometric center axis of the reversible magnet, the upper and lower surfaces of the reversible magnet are different magnetic poles, the upper surface of the reversible magnet is attached to the housing, the housing The inner cavity of the lower half is provided with a magnet, the lower surface of the reversible magnet is attached to the magnet, the magnet and the inner wall of the lower half of the housing are provided with a number of independent block permanent magnets, and a number of independent blocks The permanent magnets are evenly arranged along the circumference of the magnetizer, and the polar arrangement of the adjacent blocky permanent magnets is consistent, that is, the side of the adjacent blocky permanent magnet close to the housing is the same pole, and the side close to the magnetizer is the other pole, and The magnetic axis points to the center of the circumference of the magnetizer.

The housing is made of magnetically conductive material.

The energization triggering process is an instantaneous process in which current passes through the coil to magnetize the reversible magnet in the forward or reverse direction. Once the reversible magnetization is completed, its magnetic field strength is stored in the housing.

There is a gap between the housing and the magnetizer. Several block-shaped permanent magnets are placed in the gap. The distribution and number of block-shaped permanent magnets are subject to the balance of the magnetic field. Magnetic field balance refers to the strength of the magnetic field formed after the reversible magnet is magnetized and the strength of the magnetic field formed by the sum of several block permanent magnets, which are equivalent to achieve magnetic field balance.

The bistable electromagnet designed by the invention has two stable states, one is a magnetic stable state, and the other is a non-magnetic stable state. Once a certain state is selected, the power-on trigger is established, and then there is no need to continue power supply. The state can be maintained indefinitely and cannot be easily broken. Unless you choose another state to trigger the establishment of power, you can reverse this state, that is, change from a non-magnetic state to a magnetic state or vice versa. This process is reversible for the previous time. The magnetization of the reverse current of the magnet reverses the poles of the reversible magnet. The reversal of the two states is completed instantaneously without the need for continuous power supply, so it will not cause continuous heating and energy consumption of the bistable electromagnet. Electromagnet is a kind of energy-saving and reliable control flexible electro-magnetic conversion device.

[Description of Drawing]

Figure 1 is a bottom view of the present invention.

2 is a front view of the present invention.

Explanation of marks in the figure:

1 block-shaped permanent magnet, 2 coil packages, 3 reversible magnets, 4 magnets, 5 shells.

[detailed description]

The technical solution of the present invention will be further elaborated with reference to the drawings and embodiments, and it is believed to be clear to those skilled in the art.

A bistable electromagnet, the structure of which includes: a block-shaped permanent magnet 1, a coil package 2, a reversible magnet 3, a magnetizer 4, and a casing 5, the casing 5 is also made of a magnetically conductive material,

As shown in FIG. 2, firstly, the inner cavity of the upper half of the housing 5 is provided with a reversible magnet 3. The circumference of the reversible magnet 3 is covered with a coil package 2. The magnetic axis of the reversible magnet coincides with the geometric center axis of the reversible magnet. The reversible magnet 3 The upper and lower surfaces are different magnetic poles, the upper surface of the reversible magnet 3 is attached to the housing 5,

As shown in FIG. 1, the inner cavity of the lower half of the housing 5 is provided with a magnetizer 4, the lower surface of the reversible magnet 3 is in contact with the magnetizer 4, and a gap is provided between the shell 5 and the magnetizer 4. Several block-shaped permanent magnets 1 are placed in the gap, and several independent block-shaped permanent magnets 1 are evenly arranged along the circumference of the magnetizer 4, the polar arrangement of the adjacent block-shaped permanent magnets 1 is consistent, and the magnetic axis points to the center of the circumference of the magnetizer 4, that is, close to One side of the shell is the same pole, and the side near the magnetizer is the other pole. The distribution and number of block permanent magnets are subject to the magnetic field balance.

There is a certain proportional relationship between the size of the permanent magnet and the reversible magnet. It is affected by the magnetic field strength of the permanent magnet and the reversible magnetization strength. When the volume and magnetic field strength of the reversible magnet are fixed, the size and distribution of the permanent magnet are determined. Theoretically feasible but practical The above requires countless shapes and volumes to reach the balance between the magnetic state and the non-magnetic state, otherwise there will be residual magnetism in the non-magnetic state. The present invention solves this problem by increasing or decreasing the number of block permanent magnets. The balance between the magnetic state and the non-magnetic state makes the process of producing the invention simple and efficient.

Example one

Select the operation with magnetic state: the completion of the instant of power-on trigger is completed, the process is:

The polar arrangement of the adjacent block-shaped permanent magnets 1 is consistent, the magnetic axis points to the circumferential center of the magnetizer 4, that is, the side near the housing 5 is the N pole, and the side near the magnetizer 4 is the S pole. 2 pairs of reversible magnets 3 are magnetized and obtain a magnetic field, the upper surface of the reversible magnet 3 is N pole, the lower surface is S pole, the upper surface of the reversible magnet 3 is attached to the shell, the conductive shell 5 is N pole, and the reversible magnet 3 is attached to the lower surface The conductive magnet 4 is closed, and the conductive magnet 4 is the S pole. At this time, the magnetic field formed by the reversible magnet and the magnetic field formed by the block permanent magnet are superimposed, generating a strong magnetic force, forming a magnetic stable state, and attracting the magnetic conductive material force.

Example 2

Select the non-magnetic state operation: the completion of the instant of power-on trigger is completed, the process is:

The polar arrangement of the adjacent block-shaped permanent magnets 1 is consistent, the magnetic axis points to the circumferential center of the magnetizer 4, that is, the side near the housing is the N pole, and the side near the magnetizer 4 is the S pole. The reversible magnet 3 is magnetized by the coil 2 and a reverse magnetic field is obtained. The upper surface of the reversible magnet 3 becomes the S pole and the lower surface becomes the N pole. The upper surface of the reversible magnet 3 is attached to the housing 5 and the conductive housing 5 is the S pole , The lower surface of the reversible magnet 3 is attached to the magnetizer 4, and the conductive magnetizer 4 is the N pole. At this time, the magnetic field formed by the magnetic field formed by the reversible magnet and the magnetic field formed by the block permanent magnet attracts each other to form a self-closed structure. No magnetic stability, no attraction to magnetically conductive materials.

Claims

A bistable electromagnet, characterized in that it includes: a block-shaped permanent magnet (1), a coil package (2), a reversible magnet (3), a magnetizer (4), a housing (5), the housing (5) The inner cavity of the upper half is provided with a reversible magnet (3). The circumference of the reversible magnet (3) is covered with a coil package (2). The magnetic axis of the reversible magnet coincides with the geometric center axis of the reversible magnet. 3) The upper and lower surfaces are different magnetic poles, the upper surface of the reversible magnet (3) is attached to the housing (5), and the inner cavity of the lower half of the housing (5) is provided with a magnetizer (4) and a reversible magnet ( 3) The lower surface is in contact with the magnetizer (4), and there are several independent block-shaped permanent magnets (1) between the magnetizer (4) and the inner wall of the lower half of the housing (5). The block-shaped permanent magnets (1) are evenly arranged along the circumference of the magnetizer (4), and the polar arrangement of adjacent block-shaped permanent magnets remains the same. The side of the adjacent block-shaped permanent magnets close to the housing is the same pole, and the one close to the magnetizer The side is the other pole, and the magnetic axis points to the center of the circumference of the magnetizer (4).
The bistable electromagnet as claimed in claim 1, wherein the housing is made of magnetically conductive material.
A bistable electromagnet according to claim 1, characterized in that a gap is provided between the housing (5) and the magnetizer (4), and a number of block-shaped permanent magnets (1) are placed in the gap. The distribution and number of permanent magnets are subject to magnetic field balance.